Bone Overlay: support changing bone wireframe opacity.

When weight painting the bone overlay is extremely intrusive,
effectively requiring either extensive use of hiding individual
bones, or disabling the whole bone overlay between selections.

This addresses the issue by adding a bone opacity slider that
is used for the 'wireframe' armature drawing mode. It directly
controls the uniform opacity as a straightforward option.

Differential Revision: https://developer.blender.org/D11804

1 files changed, 28 insertions, 5 deletions

diff --git a/release/scripts/startup/bl_ui/space_view3d.py b/release/scripts/startup/bl_ui/space_view3d.py
index 3fd19dd70cf..7d8e74ed7ce 100644
--- a/release/scripts/startup/bl_ui/space_view3d.py
+++ b/release/scripts/startup/bl_ui/space_view3d.py
@@ -6504,18 +6504,38 @@ class VIEW3D_PT_overlay_sculpt(Panel):
         row.prop(overlay, "sculpt_mode_face_sets_opacity", text="Face Sets")
 
 
-class VIEW3D_PT_overlay_pose(Panel):
+class VIEW3D_PT_overlay_bones(Panel):
     bl_space_type = 'VIEW_3D'
     bl_region_type = 'HEADER'
     bl_parent_id = 'VIEW3D_PT_overlay'
-    bl_label = "Pose Mode"
+    bl_label = "Bones"
+
+    @staticmethod
+    def is_using_wireframe(context):
+        shading = VIEW3D_PT_shading.get_shading(context)
+
+        if shading.type == 'WIREFRAME' or shading.show_xray:
+            return True
+
+        mode = context.mode
+
+        if mode in ('POSE', 'PAINT_WEIGHT'):
+            armature = context.pose_object
+        elif mode == 'EDIT_ARMATURE':
+            armature = context.edit_object
+        else:
+            return False
+
+        return armature and armature.display_type == 'WIRE'
 
     @classmethod
     def poll(cls, context):
         mode = context.mode
         return (
             (mode == 'POSE') or
-            (mode == 'PAINT_WEIGHT' and context.pose_object)
+            (mode == 'PAINT_WEIGHT' and context.pose_object) or
+            (mode in ('EDIT_ARMATURE', 'OBJECT') and
+             VIEW3D_PT_overlay_bones.is_using_wireframe(context))
         )
 
     def draw(self, context):
@@ -6534,10 +6554,13 @@ class VIEW3D_PT_overlay_pose(Panel):
             sub = row.row()
             sub.active = display_all and overlay.show_xray_bone
             sub.prop(overlay, "xray_alpha_bone", text="Fade Geometry")
-        else:
+        elif mode == 'PAINT_WEIGHT':
             row = col.row()
             row.prop(overlay, "show_xray_bone")
 
+        if VIEW3D_PT_overlay_bones.is_using_wireframe(context):
+            col.prop(overlay, "bone_wire_alpha")
+
 
 class VIEW3D_PT_overlay_texture_paint(Panel):
     bl_space_type = 'VIEW_3D'
@@ -7705,7 +7728,7 @@ classes = (
     VIEW3D_PT_overlay_texture_paint,
     VIEW3D_PT_overlay_vertex_paint,
     VIEW3D_PT_overlay_weight_paint,
-    VIEW3D_PT_overlay_pose,
+    VIEW3D_PT_overlay_bones,
     VIEW3D_PT_overlay_sculpt,
     VIEW3D_PT_snapping,
     VIEW3D_PT_proportional_edit,